gyegi bihaeng bangsik
Instrument Flight Rules (IFR)
Règles de vol aux instruments (IFR) ; règles IFR ; règles de vol instrumentales
비행기는 계기 비행 방식으로 안전하게 이륙했습니다.
bihaenggineun gyegi bihaeng bangsik-euro anjeonhage ilyughaessseubnida.
The aircraft took off safely under Instrument Flight Rules.
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